A large bull elephant can weigh up to 6 metric tons - that's sixty times as much as a large human male.
How much Speed would such an elephant have to be given to elicit a noticeable effect - maybe sixty times a normal dose for a human? - and how much would that cost the Mahout?
In short: The needle on my B.S. meter is jumping.
Regards,
Something like speed would probably only cost a few pennies to make.
They’re addicted to sugar cane!